Heater



FIG. 1 is a front left elevation view of the heater;

FIG. 2 is a left elevation view of the heater of FIG. 1;

FIG. 3 is a right elevation view of the heater of FIG. 1;

FIG. 4 is a top plan view of the heater of FIG. 1;

FIG. 5 is a bottom plan view of the heater of FIG. 1;

FIG. 6 is a front plan view of the heater of FIG. 1; and,

FIG. 7 is a rear plan view of the heater of FIG. 1.

The broken line showing is included for the purpose of illustratingportions of the article and forms no part of the claimed design.

CLAIM The ornamental design for a heater, as shown and described.